|
| 5110 | Auctioneers, tobacco, wholesale | |
| 5110 | Auctioning farm machinery, from own facilities | |
| 5110 | Auctioning livestock, with own facilities | |
| 3610 | Audio cabinets, wood, manufacturing | |
| 7421 | Audio equipment consulting services | |
| 9249 | Audio recording of meetings and conferences | |
| 9249 | Audio recording post-production services | |
| 5139 | Audio system sales, wholesale | |
| 2429 | Audio tape, blank, manufacturing | |
| 9249 | Audio taping of meetings or conferences | |
| 3312 | Audio-frequency oscillators, manufacturing | |
| 8519 | Audiologists, offices of | |
| 3312 | Audiometers (except medical), manufacturing | |
| 3312 | Audiometers, manufacturing | |
| 4530 | Audio-visual wiring systems, installation only | |
| 7412 | Auditing services (CPA) | |
| 7514 | Auditor General, provincial | |
| 7514 | Auditor General's office, federal government | |
| 4520 | Auditorium construction, general contractors | |
| 7010 | Auditorium rental or leasing | |
| 7514 | Auditor's office, provincial government | |
| 6309 | Auditors, freight rate | |
| 7412 | Auditors, office of | |
| 7514 | Audits, federal administration | |
| 4510 | Auger mining services, bituminous coal or lignite, on a contract basis | |
| 4510 | Auger mining services, bituminous coal, anthracite, and lignite on a contract basis | |
| 2924 | Augers (except mining), manufacturing | |
| 2924 | Augers, mining type, manufacturing | |
| 2893 | Augers, non-powered, manufacturing | |
| 1320 | Auriferous ore mining | |
| 7499 | Authors' agents or managers | |
| 9214 | Authors, independent | |
| 5030 | Auto and home supplies, retail | |
| 5020 | Auto body repair and painting | |
| 5149 | Auto body shop supplies, wholesale | |
| 5020 | Auto detail shop | |
| 5020 | Auto emissions testing, without repairs | |
| 5020 | Auto glass installation | |
| 5020 | Auto glass replacement | |
| 5020 | Auto greasing | |
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